Warp-opening mechanism for looms



J. TOWERS.

WARP OPENING MECHANISM FOR LOOMS.

APPLICATION FILED JUNE I3. 1919.

1,344,067. Patented June 22, 1920;

Fig.1.

in we v \4 Q wallllllllllg \nventor; Jesse Towers Altys.

UNITED STATES PATENT OFFICE...

JESSE TOWERS, OE CORNWALL, ONTARIO, CANADA, ASSIGNOR TO DRAPER CCRPORA-TION, OF HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

WARP-OPENING MECHANISM FOR LOOMS.

Specification of Letters Patent. Patented June 22, 1920.

Application filed June 13, 1919. Serial No. 303,954.

To all whom it may concern:

Be it known that I, Jnssn TowERs, a citizen of the United States,residing at Cornwall, Province of Ontario, Dominion of Canada, haveinvented an Improvement in Warp-Opening Mechanism for Looms, of whichthe following description, in connection with the accompanying drawing,is a specification, like characters on the drawing representing likeparts.

This invention relates to improvements in looms and is particularlydesigned to provide a positive and eflicient adjustable mechanism foropening or separating the warps after they pass from the beam andparticularly before they pass through the detectors of the usual warpstop motion. The warps when they leave the beam are frequently stucktogether by reason of the sizing or interlocking of the fibers or knotstherein and it is highly desirable to open up or separate these warps,and break up the sizing thereupon.

The object of the invention is secured by a pair of flat membersintroduced between the warp sheets preferably between the warp beam andthe detectors of the warp stop motion and arranged to rock to anadjustable extent about one of their longitudinal edges so that as theyare thus rocked during the operation of the loom the angle between thewarp sheets is continually changed, the tension upon the warps iscontinually varied, and the warps are thus separated and the sizingthereon broken up, enabling the warps separately and freely to passthrough the detectors and finally into the fell of the cloth. 7 y

These and other objects and features of the invention will appear morefully from the accompanying description and drawings and will beparticularly pointed out in the claims. much of an ordinary type of loomprovided with a warp stop motion as is necessary to a disclosure of apreferred form of the present invention.

In the drawings Figure 1 is an elevation partially in vertical crosssection looking from the interior of the loom to one side thereof withmany of the parts removed or broken away.

Fig. 2 is a view in perspective with the central portion broken away ofthe pair of The drawings represent only so flat members employed in apreferred form of the invention.

Fig. 3 is a view in transverse section of a flat member formed by a pairof flanged plates. 1

Fig. 4 is a view in transverse section of a flat member formed of a pairof flat plates flanged at both edges and at the center.

Fig. 5 is a detail in perspective showing the connection between one ofthe connectors running to one of the members and the lever by which itis operated, a portion of the lever only being shown in dotted lines.

As the invention only has to do with one particular feature in the loom,namely mechanism for opening and separating the warps.

and breaking up the sizing thereon it is unnecessary to enter into anydetailed description of the other features of the loom which may vary asdesired. The invention is particularly applicable to a loom employing a.

warp stop motion in which the warps pass through detectors and in suchcase the mechanism is located between the warp stop motion and the warpbeam. This is desirable because if the warps are stiff or are not fullyseparated after leaving the warp beam they may catch in the detectorsand become broken. I

The loom illustrated is of a well known type comprising side frames butone of which 1 is illustrated. The warp beam which is not shown islocated as usual at the rear of the loom and the warps pass therefrom tothe usual whip roll 2. From the whip roll the warps pass to the warpstop motion which is shown as comprising two rows of detectors 3, onefor each warp. These detectors are supported by the individual warps andif a warp breaks the corresponding detector drops into the path of avibrating feeler bar 1 through which is initiated the stopping of theloom in a well known manner. From the detectors the warps are divided intwo sheets 6 and 7 b lease rods 8 and 9 and thence pass throug theheddles 10 of the harness frames 11 and thence through the reed 12carried by the lay 13 to the breast beam 14.

Supporting brackets 15 are mounted on the loom frame at each sidethereon, and in the preferred form shown between the whip roll 2 and thedetectors 3, and these brackets are arranged for vertical adjustment.For that purpose each bracket is slotted vertically at 16 and secured inplace by a bolt 17 passing through the slot into the side frame of theloom.

A pair of flat members 18 and 19 are pivotally mounted, as by trunnionsor pivots 21 and extending from one of the longitudinal edges of eachmember, in the bracket 15. These fiat members extend between and dividethe warp into two sheets. These fiat members may, as shown in Fig. 2,each be made of a single flat metal plate or, as shown in Fig. 3, eachbe made of a pair of metal plates 22 flanged at their side edges and arranged as shown or, as shown in Fig. 4, be made of a pair of metalplates 23 flanged at each edge and also struck up or flanged at near thecenter. The forms illustrated in Figs. 3 and 4tare for the purpose ofgiving greater strength to the plates with a minimum amount of metal.

it will thus be seen that if these flat members are rocked in oppositedirections about their pivots during the operation OiltllO loom theywill act to change the angle between the two warp sheets and vary thetension thereupon thus acting at the same time to separate the wa ps andbreak up the sizing thereon.

Suitable means are provided for rocking the members in oppositedirections during the operation of the loom. These means are so arrangedas to effect a positive movement of the flat members when rocking apartso as to effect a positive and firm action upon the warp sheets andthese means are so ar ranged as to effect a yielding movement of themembers in closing or rocking together.

As a simple and eliicient means for securing the desired rockingmovements of the flat members the construction illustrated in thedrawings is provided.

In the construction illustrated a cam 25 is mounted upon the usual camor other shaft 26 which is continually rotated during the operation ofthe loom. This cam has its face in engagement with a lever 27 fulcrumedat 28 upon the loom side or a shaft projecting therefrom and the leverin turn is held in contact with the cam 25 by a spring 29 con nectingthe opposite end of the lever with a fixed point 30 on the loom side.

Suitable connectors such as rods 31 and 32, the length of which areadjustable as by turn buckles 33, extend respectively from points atopposite sides of the fulcrum of the lever to the flat members. At theupper ends these connectors are shown as pivote'd upon pivots or'trun'iiions 34. and 35 respectively projecting from'the edges of theflat members 18 and-19. At their lower ends these connectors, as shownmore clearly in Fig. 5, are provided with brackets 36 verticallyadjustable thereon by set' screws 37. These brackets havexprojectingtransversely therefrom pivot studs 38 passing through one of a row ofholes in the lever 27 and held in place by cotter pins 39.

It willthus be seen that by adjusting the pivot studs 38 into one or theother of the various holes inthe lever 27, by adjusting the turn buckles33, and by adjusting the brackets 36, one or the other or all as desired, the extent of the rockingmovement of the members may be adjustedtogether or independently to any desired extent. It will'also be seenthat the position of the two flat members between the warp sheets may bevertically adjusted by adjusting the brackets 15. Thus the action of theflat members upon the warps may be controlled or adjusted to any desiredextent.

The invention thus provides a simple and effective means for securingthe desired results and one which may be readily applied to existinglooms without any change in the constriiction thereof but by the simpleaddition of the necessary parts embodying the invention.

Having thus described my invention what Iclaim as new and desire tosecure by Letters Patent is A loom comprising a frame, a pair of flatmembers extending between the warp sheets, each member being pivotallymounted on the frame to rock about one of its longitudinal edges, alever fulcrumed on the frame, means for rocking the lever, a pair oflongitudinally adjustable rods pivoted at their upper ends IGSPOCiJlVGlyto said flat members and at their lower ends respectively and adjustablyconnected to said lever at opposite sides of the fulcrum thereof wherebythe extent of the rocking movement of the Hat members may be readilyadjusted.

In testimony whereof, I have signed my name to this specification.

JESSE TOWERS.

